LCD-Monitor Chassis LHA20BS Model SERVICE LCD Monitor 203B Manual Fashion Feature - Premium HAS application(Lift 80mm) - Magic Rotation application (Auto pivot Delete) - Embeded Power, Mechanical S/W application
Copyright Trademarks ©2005 by Samsung Electronics Co., Ltd. Samsung is the registered trademark of Samsung Electronics Co., Ltd. All rights reserved. This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Samsung Electronics Co., Ltd. LHA20BS Service Manual First edition January 2006. Printed in Korea.
Contents 1. Precautions ………………………………………………………………………………………………………………………………………1 1-1 1-1 Safety Precautions ……………………………………………………………………………………………………………………… 1-1 1-2 Servicing Precautions …………………………………………………………………………………………………………………… 1-2 1-3 Electrostatically Sensitive Devices (ESD) Precautions ……………………………………………………………………………… 1-2 1-4 Installation Precautions ………………………………………………………………………………………………………………… 1-3 2.
Contents 9. Schematic Diagrams ……………………………………………………………………………………………………………………………9 9-1 9-1 Schematic Diagrams ……………………………………………………………………………………………………………………… 9-1 9-2 Schematic Diagrams ………………………………………………………………………………………………………………………9-3 10.
-This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable International and/or domestic law. Samsung Electronics Co.,Ltd. 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Gyeonggi-Do, Korea, 443-742 Printed in Korea P/N : BN82-00136F-00 URL : http://itself.sec.samsung.co.
10 Operating Instructions and Installation 10 Operating Instructions and Installation 10-1 Front 1. Menu button Opens the OSD menu. Also use to exit the OSD menu or return to the previous menu. 3) Internet : Medium brightness For working with a mixture of images such as text and graphics. 2. MagicBright button MagicBright is a new feature providing optimum viewing environment depending on the contents of the image you are watching.
10 Operating Instructions and Installation 4. Enter button / Source button Activates a highlighted menu item. / Push the 'SOURCE', then selects the video signal while the OSD is off. (When the source button is pressed to change the input mode, a message appears in the left upper side of the screen displaying the current mode -- analog or digital input signal.) Note : If you select the digital mode, you must connect your monitor to the graphic card's port using the DVI cable. 5.
10 Operating Instructions and Installation DVI IN port : Connect the DVI Cable to the DVI IN port on the back of your monitor. (SOURCE : digital) RGB IN port : Connect the signal cable to the RGB IN port on the back of your monitor. (SOURCE : analog) Kensington Lock : The Kensington lock is a device used to physically fix the system when using it in a public place. (The locking device has to be purchased separately.) Stand Stopper : Remve the fixing pin on the stand to lift the monitor up and down.
10 Operating Instructions and Installation 10-3 Using the Stand 10-3-1 Removing the base 1. Turn off your monitor and unplug its power cord. 2. Lay the LCD monitor face-down on a flat surface with a cushion beneath it to protect the screen. 3. Remove four screws(A) and then remove the Stand from the LCD monitor.
Operating Instructions and Installation 10-3-2 Attaching a Base - This monitor accepts a 100mm x 100mm VESA-compliant mounting interface pad. 1 2 3 4 A. Monitor B. Mounting interface pad 1. Turn off your monitor and unplug its power cord. 2. Lay the LCD monitor face-down on a flat surface with a cushion beneath it to protect the screen. 3. Remove four screws and then remove the stand from the LCD monitor. 4.
10 Operating Instructions and Installation Memo 10-6
11 Disassembly and Reassembly 11 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the 203B TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 11-1 Disassembly Cautions: 1.Please the power off, before disassemble the monitor. 2.Please do not use other jig except given jig when disassemble. 3.Please disassemble based on given process as below. 4.
11 Disassembly and Reassembly Description 3. Remove 1 screws from Lamp shield 4. Disconnect a FUNCTION Wire from PCB ASS Y. 5. Disconnect 4 Lamp Wire and Wire. 6. Disconnect a LVDS Wire from Panel.
11 Disassembly and Reassembly Description Picture Description 7. Remove 4 hexa screws from PBA board which is connected PCB bracket. 8. Remove 4 screws from PBA board and pull up the PBA from the bracket as picture. 9. Totally disassembled PBA board. 11-2 Reassembly Reassembly procedures are in the reverse order of disassembly procedures.
11 Disassembly and Reassembly Memo 11-4
13 Circuit Descriptions 13 Circuit Descriptions 13-1 Block description 13-1
13 Circuit Descriptions 13-2 Block operating No Feature 1 Scaler 2 DDR MEMORY 3 MICOM Description Scaler Integrate ADC and TMDS, Scaling part. DDR memory Save frame information that SCALER needed . Microcontroller. Micom control all function of monitor. Analog signal from the PC is changed to digital signal using the A/D converter integrated in scaler(MST6281). Scaler scale this digital singal to optimal signal fit to the panel and encode the LVDS signal.
14 Reference Infomation 14 Reference Infomation 14-1 Technical Terms - TFT-LCD (Thin film Transistor Liquid Crystal Display) ADC(Analog to Digital Converter) This is a circuit that converts from analog signal to digital signals. - PLL(Phase Locked Loop) During progressing ADC, Device makes clock synchronizing HSYNC with Video clock - Inverter Device that supplies Power to LCD panel lamp. This device generates about 1,500~2,000V. - SMPS(Switching Mode Power Supply) Switching Mode Power supply.
14 Reference Infomation - Dot Pitch The image on a monitor is composed of red, green and blue dots. The closer the dots, the higher the resolution. The distance between two dots of the same color is called the 'Dot Pitch'. Unit: mm - Vertical Frequency The screen must be redrawn several times per second in order to create and display an image for the user. The frequency of this repetition per second is called Vertical Frequency or Refresh Rate.
14 Reference Infomation - Connecting the Monitor 1. Connect the DC adapter for your monitor to the power port on the back of the monitor. Plug the power cord for the monitor into a nearby outlet. 2-1. Using the D-sub (Analog) connector on the video card. Connect the signal cable to the 15-pin, D-sub connector on the back of your monitor. 2-2. Using the DVI (Digital) connector on the video card. Connect the DVI cable to the DVI port on the back of your monitor. 2-3. Connected to a Macintosh.
14 Reference Infomation 14-2 Pin Assignments Sync Type Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15-Pin D-Sub Signal Cable Connector Separate Composite Sync-on-green Red Green Blue GND DDC Return (GND) GND-R GND-G GND-B DDC Power Input (+5V) Self Raster GND Bi-Dr Data (SDA) H-Sync. V-Sync. DDC Clock (SCL) Red Green Blue GND DDC Return (GND) GND-R GND-G GND-B DDC Power Input (+5V) Self Raster GND Bi-Dr Data (SDA) H/V-Sync. Not Used DDC Clock (SCL) Red Green + H/V Sync.
14 Reference Infomation 14-3 Timing Chart - This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. Table 14-1 Timing Chart VESA IBM Mode VGA2/ 70 Hz Timing VGA3/ 60 Hz 640/75 Hz 800/60 Hz 800/75 Hz 1024/60 Hz 1024/75 Hz 1280/60 Hz 1280/75 Hz 720 x 400 640 x 480 640x480 800x600 800x600 1024x768 1024x768 1280x1024 1280x1024 fH (kHz) 31.469 31.469 37.500 37.879 46.875 48.363 60.023 63.981 79.
14 Reference Infomation 14-4 Preset Timing Modes - If the signal transferred from the computer is the same as the following Preset Timing Modes, the screen will be adjusted automatically. However, if the signal differs, the screen may go blank while the power LED is on. Refer to the video card manual and adjust the screen as follows. Table 1. Preset Timing Display Mode Horizontal Frequency (kHz) Vertical Frequency (Hz) Pixel Clock (MHz) Sync Polarity (H/V) MAC, 640 x 480 35.000 66.667 30.
14 Reference Infomation 14-5 Panel Description Maker SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC VENDOR P/N LT140X1-002 LT150XS-L01 LT150XS-L01-B LTM150XS-L02 LT181E2-132 LT150XS-T01 LTM181E3-132 LT170E2-131 LT181E2-131 LTM170E4-L01 LTM240W1-L0
14 Reference Infomation Maker SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC SEC CPT CPT CPT CPT CPT CPT CPT CPT CPT CPT CPT CPT TOSHIBA TOSHIBA TOSHIBA TOSHIBA TOSHIBA TOSHIBA TOSHIBA TOSHIBA HANNSTAR HANNSTAR HANNSTAR HANNSTAR HANNSTAR HANNSTAR TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN 14-8 VENDOR P/N PANEL_CODE LTA460H1-L01 LTM170EU-L11 LTM24
14 Reference Infomation Maker TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN TORISAN SHARP SHARP SHARP HITACHI HITACHI HITACHI HITACHI HITACHI HITACHI HITACHI IBM UNIPAC HYUNDAI HYUNDAI HYUNDAI HYUNDAI HYUNDAI HYUNDAI HYUNDAI HYUNDAI HYUNDAI HYUNDAI HYUNDAI ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER ACER CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIMEI CHIM
14 Reference Infomation Memo 14-10
2 Product Specifications 2 Product Specifications 2-1 Fashion Feature -. Premium HAS application(Lift 80mm) -. Magic Rotation application(Auto pivot Delete) -. Embeded Power, Mechanical S/W application 2-2 Specifications Item Description LCD Panel TFT-LCD panel, RGB vertical stripe, normally black transmissive, 20-Inch viewable, 0.255 (H) x 0.255 (V) mm pixel pitch Scanning Frequency Horizontal : 31 kHz ~ 80 kHz (Automatic) Vertical : 56 Hz ~ 75 Hz (UXGA : 60 Hz) Display Colors 16.
2 Product Specifications 2-3 LS20BRD feature No Feature 1 Auto Auto 2 Auto Power on/off 204B can check the change of Source Automatically and change the source to the active Input 3 Wall mount 204B supports Wall mount(100 X 100) 4 Gamma & Color temperature Adjust 204B supports 3 step Adjustment for Gamma & Color temperature 5 Magic Bright 204B supports 6 different brightness mode (Text/Internet/game/sport/Movie/Custom) 6 Sharpness 2-2 Feature If 204B turns on in some resolution for the f
2 Product Specifications 2-4 Spec Comparison Model -)" #4 # -4 #3% # Design 4DSFFO 4J[F #SJHIUOFTT DE ̅ DE ̅ $POUSBTU 'BTU 3FTQPOTF 5JNF NT 5ms .BHJD 1JWPU 0 8IFO .POJUPS JT SPUBUFE BT 1JWPU TFOTPS JT BQQMJFE UP 1#" 4DSFFO JT DIBOHFE BVUPNBUJDBMMZ X .BHJD 5VOF 7FS 7FS 4IBSQOFTT 0 O TUFQT 5FYU *OUFSOFU 4QPSUT .PWJF (BNF $VTUPN TUFQT 5FYU *OUFSOFU 4QPSUT .PWJF (BNF $VTUPN .
2 Product Specifications 2-5 Option Specification Item Item Name CODE.
4 Troubleshooting 4 Troubleshooting 4-1 No Power There is no light in the power indicator. 1 Does proper DC 14 V appear at Pin 5,6,7 of CN101? No Check the IP Board. Yes 2 Does proper DC 5V appear at Output of IC203? No Check the IC 203 Yes 3 Does proper DC 3.3V appear at Pin 4 of the IC403? No Check the IC 403. Yes 4 Does proper DC 2.5V appear at Pin 3 of the IC301? No Check the IC 301. Yes 5 Does proper DC 1.8V appear at Pin 2 of the IC304? No Check the IC 304.
4 Troubleshooting WAVEFORMS 1 2 3 4 5 4-2
4 Troubleshooting 4-2 No Video (PC Analog Signal) 6 Is pin9 of CN501(BKLT_EN)high(3.3V)? No Check TFT_LCD panel or inverter and connection between then. Yes Does the analog video signal 7 appear at R101,105, 108 (Red,Green,Blue)? No Check pc signal. Yes 8 Does the X201 and X200 oscilate Properly? No Check the X200, IC201. Yes Does the proper clock pules appear at Pin6,7 of the CN201? 10 No Check IC302 and IC201. Yes Replace LCD Panel.
4 Troubleshooting WAVEFORMS 6 7 8 10 4-4
4 Troubleshooting 4-3 No Video (PC Digital Signal) 1 Is Pin9 of CN501(BKLT_EN)high(3.3V)? No Check TFT_LCD panel or inverter and connection between then. Yes Does the Digital video signal appear at 11 R129~R136? No Check PC signal. Yes Does the proper clock pules appear at Pin6,7 of the CN201? 10 No Check IC301 and 302. Yes Replace LCD Panel.
4 Troubleshooting WAVEFORMS 1 11 4-6 10
5 Exploded View & Parts List 5 Exploded View and Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself. sec. samsung.co.
5 Exploded View & Parts List Location.No CODE-NO SPECIFICATION & DESCRIPTION T0003 BN96-02834G ASSY COVER P-FRONT;LS20HAB (S/M 203B),AB M0112 BN63-02258F COVER-FRONT;LS20HAB (S/M203B),ABS,T2.2,H 1 S.N.A T0022 BN64-00377B KNOB CONTROL;HA17TS,PC CLEAR,T2.1,9,112, 1 S.N.A M0145 BN96-02474C ASSY BOARD P-FUNCTION;HAYDN,YWP-VD-05-05 1 S.A M0215 BN07-00268A LCD-PANEL;M201P1-L01,Brahms,6Bit FRC,432 1 S.A M0006 BN96-03342A ASSY SHIELD P-COVER;LS20HAB (203B),SECC, 1 S.N.
5 Exploded View & Parts List 5-2 LHA20BS(LS20HABESQ/EDC) Exploded View(SLIDING HAS) M0215 M0006 T0003 M0014 M0174 M0107 1 M00006 M0112 M0003 T0022 M0145 3 2 5-3
5 Exploded View & Parts List Location.No CODE-NO SPECIFICATION & DESCRIPTION T0003 BN96-02834G ASSY COVER P-FRONT;LS20HAB (S/M 203B),AB M0112 BN63-02258F COVER-FRONT;LS20HAB (S/M203B),ABS,T2.2,H 1 S.N.A T0022 BN64-00377B KNOB CONTROL;HA17TS,PC CLEAR,T2.1,9,112, 1 S.N.A M0145 BN96-02474C ASSY BOARD P-FUNCTION;HAYDN,YWP-VD-05-05 1 S.A M0215 BN07-00268A LCD-PANEL;M201P1-L01,Brahms,6Bit FRC,432 1 S.A M0006 BN96-03342A ASSY SHIELD P-COVER;LS20HAB (203B),SECC, 1 S.N.
6 Electrical Parts List 6 Electrical Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 6-1 LHA20BS Parts List(ROUND SIMPLE) Level Loc. No. 0 Code No. Description & Specification LS20HABKBQ/XAA 203B,SPA1/S20B1-LHA,20,LCD-MO,UNITED STA Q'ty SA/SNA 0.1 ..2 ...3 ...3 ...3 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....
6 Electrical Parts List Level ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 6-2 Loc. No.
6 Electrical Parts List Level ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 Loc. No.
6 Electrical Parts List Level Loc. No. ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 .....5 ....4 ....4 ....4 ..2 ...3 ...3 ..2 ..2 ..
6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA ..2 ..2 ..2 ..2 T0376 T0524 P/M M0081 6902-000379 6902-000520 6902-000604 6902-000609 BAG AIR;LDPE,T0.2,W1000,L1800,TRP,-,-BAG PE;HDPE/NITRON(DOUBLE),T0.015/T0.5(D BAG WRAPPING;LDPE,T0.02,W500,L10000,TRP, BAG ROLL;LDPE,T0.05,W2400,L1000,TRP,-,- 0.002 1 1.38 0.028 S.N.A S.N.A S.N.A S.N.A 0.1 ..2 ..2 ..2 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ..2 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ...3 ....4 ....
6 Electrical Parts List 6-2 LS20HABESQ/EDC Parts list (SLIDING HAS) Level Loc. No. Code No. Description & Specification LS20HABESQ/EDC 203B,SPA1/S20B1-LHA,20,LCD-MO,NETHERLAND Q'ty SA/SNA 0.1 ..2 ...3 ...3 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ...
6 Electrical Parts List Level ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 Loc. No.
6 Electrical Parts List Level ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 6-8 Loc. No.
6 Electrical Parts List Level ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 Loc. No.
6 Electrical Parts List Level Loc. No. ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 ....4 .....5 ....4 ....4 ....4 ....4 ..2 ...3 ...3 ..2 ..2 ..2 T0568 T0568 T0568 T0568 T0568 T0568 T0568 CN330 CN330 T0010 MICOM IC115 IC109 T0087 C314 T0077 M0006 0.1 ..2 Code No.
8 Wiring Diagram 8 Wiring Diagram Connected to the I/P board Connected to the Panel through the LVDS cable For test(not used) For DVI signal For function key For Analog signal 8-1
8 Wiring Diagram Memo 8-2
9 Schematic Diagrams 9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-1 Schematic Diagrams(1) CN102 +14V_INV C110 16V 100nF C111 16V C112 16V 100nF 100nF C113 16V 100nF C114 16V 100nF C115 16V C116 16V 100nF 100nF 100nF +3.
9 Schematic Diagrams 1 9-2 6 7
9 Schematic Diagrams 9-2 Schematic Diagrams(2) +3.3V_DVDD +3.3V_DVDD R300 PANEL_EN CHK_DSUB PL_PROTECTION LED_GREEN NV_PRT NVRAM_SDA NVRAM_SCL CHK_DVI XREF XREF XREF 4.7Kohm 100ohm 3Kohm R309 R311 R313 R307 DEFAULT_NET_TYPE 14.31818MHz +5V_IN R303 2.2Kohm C B XREF E X300 +3.3V_DVDD +3.3V_AVDD +3.3VA_LV +3.
9 Schematic Diagrams 2 3 8 10 9-4 4 5
